This product ensures that the purchase is from mobile phone manufacturers' accessory sales channels, absolutely 100% genuine original. The transparent cover window provides important information when the cover is closed. Answer or reject calls when the folio is closed. It applies to: Samsung Galaxy S21 Ultra 5G. Available colors: Black, Gray. Keeps your phone clean. The Smart Clear View Cover is infused with an antimicrobial coating that blocks microbial growth to protect against certain bacteria. So you can worry less about germs and stay focused on what's at hand. Use your phone, screen unseen. Stay on top of notifications and messages without opening the cover. Icons keep you aware of what you need to know, like messages, battery life, time, and more. Easy control with a tap. Stay on top of notifications and messages without opening the cover. Icons keep you aware of what you need to know, like messages, battery life, time, and more. Innovative design. A clear strip along the side of the cover lets your phone peek out. It also adds a sleek touch to the design of the case. Protected from one side to the other. With the flip cover on the front and the case on the back, the Smart Clear View Cover surrounds your phone to protect it. It even fits well to secure the outer parts, such as the camera and buttons. Precisely powered. The S Pen has 4096-level pressure sensitivity, and the 0.7mm diameter tip provides a smooth and precise writing experience. With your Galaxy S21 Ultra 5G smartphone, just hover the pen over the screen of your phone, click the S Pen button to launch the floating window command, and the S Pen can start writing or editing. Note: Before updating the phone software, please disassemble the mobile phone case. After the mobile phone upgrade is complete, install the mobile phone case. If you use a mobile phone case to upgrade the phone system, it will cause the chips in the phone case to not be able to adapt to the phone system, resulting in the mobile phone case not being able to be used. When the NFC function of the phone is turned on, the protective cover can realize the mirror intelligent function and the automatic wake-up/close screen function. Avoid the phone being close to metal objects, otherwise, you may not be able to achieve the above functions. Note: Don't forget to disassemble the phone case before updating the system on your phone. It's good for your phone case. We appreciate your understanding and patience.